"The biggest jump was the shipment of limestone," said Dean Haen, director of Brown County Port and Resource Recovery. "Limestone tonnage increased 63 percent compared to 2013. Those are numbers that will help us reach our tonnage goals for the year."

The port imported 147,072 tons of limestone in June.

Total tonnage for June was 350,654, a 28 percent more than the previous June. For the year, the port handled 671,097 tons of materials, 4 percent behind 2013's pace.